Improvement in tools for cutting stone



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HUGH YOUNG, OF MIDDLETOWN, CONNECTICUT, AND JAMES L. YOUNG,

OF NEW YORK, N. Y.

Letters Patent No. 108,425, dated. October 18, 1870 antedated October 2, 1870.

IMPROVEIVIEN'I IN TOOLS FOR CUTTING STONE.

The Schedule referred to in these Letters Patent and making part of the same.

\Ve, HUGH YOUNG, of Middletowrn'in thevcounty of Middlesex and State of Connecticut, and JAMES L. YOUNG, of New York, in the county and State of New York, have invented certainlmprovements in rlools for Cutting Stone, of which the following is a specification.

Nature (mtl Object of thc Intention'.

This invention relates to tools for 'cutting stone, and it consists in apendulum tool, or diamond bearer, protected by two distinct diamonds or clusters of diamonds, orother hard stones, and of such construction, and in such combination with a blade or guiding sheet of metal, mounted so as to have a rectilinear motion in the line of the cut or channel to be made in the stone to be divided, as that when the blade is moved in one direction the one diamond or cluster ot' diamonds shall be brought into action, and 'when the blade is moved in the other direction the other diamondor cluster of diamonds shall be brought into action, and these results obtained; viz., that the diamonds may always be set with their cutting-points toward the work they are to do; that they are relieved from all wear when returning, and that the setting ofthe diamonds is notinjured by wear, stroke, or pressure from behind.

Description of Drawing.

Figure 1 is a front view of the blade or guiding sheet of metal, in combination with which our improved tool is to work.

Figure 2 is a front view on a larger scale of a portion of the same, and of one of our improved pendulum-tools pivoted thereon.

Figure 3 is a transversal sectional view of the same through the line a',

General Description.

A is a blade or tool bearing and guiding sheet of metal, which is made of proper dimensions for resisting the strain peut upon it, and which is mounted in any approved manner in guiding-frames, or otherwise, of a machine wherein it will receive a rectilinear' go and come motion in the line of the cut to be made in the stone.

rlhis Vblade A has holes, o a c, Sac., at different places, giving choice in which to pivot the pendulum cutting-tool B, and said blade is notched so as to allow oi' the pendulous-motion of the cutter B, and with the abutting edges D C and D C", corresponding to those parts ot' the said cutter B which come against them.

B is our improved 'l'lcmlulum-cutting tool which is an obtuse angle one with the other, each of which edges bear or is protected by one or more diamonds, or other hard stones, the diamond or cluster of diamonds having to be, alone or coujointly, sufcient to" cut or plow out the channel to be made.

The pendulum piece B, can swing freely upon the bolt and nut l l, and assume the two positions indicated' in iig. 2 of our drawing, and the angle of the `two edges, G H and H S, bear such relation to the two parts F L that when L comes in contact with the abutting edge C D', the edge opposite, or G H, willbe parallel, or about so, to the line of motion of the blade A, and the edge H S will be elevated from the. line described by the motion of the edge H G, and when the part F is brought in contact `with the part C 1) then it will bc the edge H S which will become approximately parallel to the line of motion of the blade A, and the edge G H will be elerated.

` The diamond or diamonds of the edge G H are, therefore, dist-inet from the diamond or diamonds of the edge H S, and rice tersa, those on each edge having their points or cutting iedges turned in opposite directions, one from the other, so that when the blade A is moving in the direction of the arrow, (tig. 2,) the diamond or diamonds ot' the edge G H are in the best position for cutting in that direction, and when the movement is reversed the diamond or diamonds on the edge Hv S, (which is then brought down,) are in the best position for cutting in that direction, while. in either case, the diamonds not at work are so elevated by the pendulous motion of the tool that they and the set-ting of them are freed from wear and damage.

rlhe diamonds for the protection of thc tool B may be set directly in the tool or in separate blocks, K, inserted therein.

In order to prevent the nut l from becoming loose upon the bolt T, we have drilled a small hole, t, through the head of the bolt '.l, and through the nut l', and we insert therein a small rivet, screw, orl pin, which .clfectually locks the nut upon the bolt, but which being removed allows of the nut being unscrewed.

f ter of diamonds, substantially as herein set forth.

y 2. The combination of the pendulum-tool B, with the blade A, substantially in the manner and for the purposes specified.

-Witnessesz MosEsE. GRAsTo, FRANK P. CRAsTo.

HUGH YOUNG. JAMES L. YOUNG. 

